Why don't we call the "plugins" directory as "commands"?

For example: in the future. Some one wanna to contribute this project with his/her idea. "Implement a new feature just released by TG".

So. the current plugins directory (Assuming they do not have own repository, just pull then add commands). It's can not update to remote repository anymore (local change conflict).

.....
Many, many cases i can imagine.

Also. call "plugins" does not cleary in meaning name. While plugin just mean "attach/detachable" and it's also "does not required, the project can work with out plugin".